1. Isotonic Saline Solution (0.9% NaCl): This is a simple and commonly used diluent, especially for routine blood cell counts. It maintains the osmotic balance of the red blood cells, preventing them from shrinking or swelling.
2. Hayem's Solution: This solution contains sodium chloride, sodium sulfate, and mercuric chloride. It is often used for counting red blood cells because it helps to preserve the cells and prevent their lysis. However, its use has been declining due to the toxicity of mercuric chloride.
3. Gower's Solution: This solution contains sodium chloride, sodium sulfate, and formaldehyde. It is a less toxic alternative to Hayem's solution and is also used for red blood cell counting.
4. Dacie's Solution: This solution contains sodium chloride, sodium citrate, and formaldehyde. It is used for red blood cell counting and is known for its ability to preserve cell morphology.
5. Türk's Solution: This solution contains glacial acetic acid and gentian violet. It is used for counting white blood cells and is particularly useful for distinguishing between different types of white blood cells.
6. Ammonium Oxalate Solution: This solution is used for red blood cell counting and is known for its ability to prevent cell aggregation.
Factors to consider when choosing a diluent:
* Intended use: The purpose of the dilution (e.g., cell counting, morphology assessment)
* Specific requirements: Specific cell preservation needs or staining requirements
* Toxicity: Safety considerations for the user and the sample
Note: The specific composition and concentration of each diluent can vary depending on the manufacturer. It is always important to consult the manufacturer's instructions for use.
